What are some items that really aren't worth paying the expensive version for?

I've used hammers a lot in my life. I came across a really cheap brand of hammer which made me realize it was in fact possible to make a hammer poorly. The head wasn't even hardened. Hitting nails literally left dents in it. I broke the claw trying to pull a nail that was less than 6" long. It's possible that someone in your situation would have found value in this hammer, but I think someone who did something more involved than framing a single wall wouldn't.